Measuring average velocities in channels with surfaces open to atmosphere has been challenging. A new method using open-flow channel equations could help.

A new equation for accurate approximation of the Moody friction factor in the general gas-flow equation better approximates a wide range of Reynolds numbers than previously published equations.

THE flow of blood in the microcirculation is of great physiological and clinical importance but, because of its complexity, the mechanism is not fully understood. Fahraeus and Lindqvist 1 first ...